Problem: A filament infinitely long and straight, parallel to the x axis, carrying a current I = 25 A, in the positive direction of the axis x. A winded circular of 20 turns of a conductor, carries a current I. The winded is located in the xy plane with its center at a perpendicular distance of the filament, d = 2 m.
Part A: If the magnetic field at the center of the winded is zero, how much is the magnitude and the direction in which the winded current flows?
I need help to find how much is the magnitude and the direction in which the winded current flows.